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9 Communication with a PLC
Mitsubishi Alarm Modems can communicate with a PLC in two different ways:
b
The Mitsubishi Alarm Modem can speak the language of your PLC.
Technical feature:TherequiredPLC driveris integrated inthe Mitsubishi Alarm Modem.
b
The Mitsubishi Alarm Modem and the PLC can speak a joint language.
Technical feature: Mitsubishi Alarm Modem and PLC use the same protocol,
e.g. Modbus.
9.1 PLC driver in the Mitsubishi Alarm Modem
Mitsubishi Alarm Modems can communicate with the relevant PLCs using their protocols with
-
out having to load a program, driver or function block into the PLC concerned. They then have
direct access to all variables, markers and I/O on the PLCs.
The Alarm Modem can easily be set with parameters using the software MX-Mitsubishi Alarm
Editor.
These PLCs are supported:
Alpha XL and MELSEC FX1S/1N, FX2N/2NC
For MAM-PLC communication, the internationally standardized fieldbus system Modbus
(ASCII and RTU) may also be utilized.
Communication with a PLC PLC driver in the Mitsubishi Alarm Modem
Mitsubishi Alarm Modem 9-1